FOOD SERVICE PLUMBING
Restaurant tenant improvement plumber for commercial kitchens
WHY RESTAURANTS ARE DIFFERENT
Two permits, three reviewers and no room to improvise
A restaurant tenant improvement runs through more approvals than any other commercial build-out. The building department reviews the plumbing plans, the sanitation district or wastewater authority reviews the grease interceptor, and the health department reviews the kitchen as a food facility. All three have to be satisfied, and they do not always want the same thing.
Almost every one of those requirements traces back to the equipment schedule. Fixture counts, hot water demand, gas load, floor sink locations and interceptor sizing are all calculated from what is on the cook line. If the equipment list changes after the underground goes in, the underground changes with it.
So we start with the equipment schedule and the plumbing rough-in drawing from the kitchen consultant, reconcile them against the architectural plan, and resolve the conflicts on paper — before the saw cutting starts.
Restaurant plumbing scope
- Grease interceptor sizing, permitting and installation
- Floor sinks, floor drains and trench drains
- Indirect waste for all food-contact equipment
- Hot water sized for dish machine and three-compartment sink
- Gas service and distribution to the cook line
- Backflow prevention for carbonation and beverage equipment
KITCHEN SYSTEMS
What the kitchen actually needs from the plumbing
Grease interceptors
Interior hydromechanical units and exterior in-ground interceptors, sized from the fixture and equipment load, with the sanitation-district submittal and the sampling access the authority requires.
Floor sinks and drains
Floor sinks set flush and true under the equipment they serve, area and trench drains sloped correctly, and a floor that drains where the health inspector expects it to.
Indirect waste
Air gaps and air breaks for ice machines, dish machines, prep sinks, steam equipment and walk-in condensate, so nothing food-contact is hard-piped to the sanitary system.
Commercial hot water
Water heaters or boilers sized for peak demand rather than fixture count alone, with mixing valves, recirculation and the venting and combustion air the installation needs.
Gas service and distribution
Load calculation for the full cook line, service upsizing where the meter cannot carry it, distribution, shutoffs and connections coordinated with the hood and fire-suppression contractors.
Backflow protection
Assemblies for carbonators, beverage systems, mop basins and any equipment that can draw back into the potable supply, tested and certified at completion.
HOW WE RUN IT
The restaurant build-out sequence
01
Equipment schedule first
02
Interceptor determination early
03
Dual submittal
04
Underground with the kitchen plan overlaid
05
Rough-in and gas test
06
Trim, certify, health inspection
COMMON QUESTIONS
Restaurant plumbing questions
It comes from the fixture and equipment load, the seating count or a drainage-fixture-unit calculation, depending on which method your local authority uses. Because the methods differ by jurisdiction, we confirm the requirement with the sanitation district in writing before the underground layout is final.
Only if it is the right size for your menu and equipment, it is structurally sound, and the authority will accept it. We inspect and pump it before making that call, because an undersized interceptor discovered after opening is a compliance problem, not just a plumbing one.
Food-contact equipment cannot be hard-connected to the sanitary system, because a backup would contaminate it. Ice machines, dish machines, prep sinks and similar equipment drain through an air gap or air break into a floor sink instead. Health inspectors check this closely.
Often it will not. Restaurant equipment adds a large connected load, and the shell meter was usually sized for a general tenant. We run the load calculation early and start the utility upsizing request as soon as the equipment list is set, because that request has its own lead time.
We handle the plumbing portion of the food-facility submittal and attend the inspection. The kitchen consultant or architect normally leads the overall food-facility plan review, and we supply the drainage, indirect waste and hot-water details it needs.